package Operation;

import Book.Book;
import Book.BookList;

import java.util.Scanner;

public class DelOperation  implements IOPeration{
    @Override
    public  void work(BookList bookList) {
        System.out.println("删除图书");
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入要删除的图书: ");
        String name = scanner.nextLine();

        int pos = 0;
        int i = 0;
        int currentSize = bookList.getUsedSize();
        for ( i = 0; i <currentSize; i++) {
            Book book = bookList.getBooks(i);
            if (book.getName().equals(name)){
                pos = i;
                break;
            }
        }
        if(i == currentSize){
            System.out.println("没有你想要的图书");
            return;
        }
        int j = pos;
        for (; j <currentSize-1; j++) {
            Book book = bookList.getBooks(j+1);
            bookList.setBooks(j,book);
        }
        bookList.setBooks(j,null);
        bookList.setUsedSize(currentSize - 1);
    }
}
